Study of diffusion tensor imaging in brain ringlike-enhanced lesions
- VernacularTitle:扩散张量成像在脑环形强化病变中的鉴别诊断价值
- Author:
Rui-Hua SHI
;
Ren-You ZHAI
;
Xiao-Jun QIAN
;
Wan-Hong LU
;
Hua GU
;
- Publication Type:Journal Article
- Keywords:
Magneticresonanceimaging;
Brainabscess;
Glioblastoma;
Neoplasmmetastasis
- From:
Chinese Journal of Radiology
1999;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate diagnostic value of diffusion tensor imaging(DTI)in ringlike- enhanced lesions.Methods Nine abscesses,12 glioblastomas,10 metastases confirmed clinically or pathologically underwent conventional MRI and DTI.Average diffusion coefficient(ADC)value,fractional anisotropy(FA)value and maps were calculated in the central portion and peripheral edema of the lesions. Results On DTI,the abscesses displayed as hyperintense signal with hypointense or isointense signal of edema;but glioblastomas and metastases all showed as hypointense signal with isointense or hypointense signal of edema.On ADC map,the abscesses showed as hypointense signal,the mean ADC value was (0.66?0.07)x10~(-3)mm~2/s,The mean ADC value were(2.50?0.11)x10~(-3)mm~2/s and(2.37?0.52)x10~(-3)mm~2/s for the glioblastomas and metastases,respectively,all demonstrated as hyperintense signal with slightly hyperintense signal of edema.The difference between abscess and necrotic tumors was statistically significant(F=108.80,P
